The prefix inter- comes from the Latin prefix inter-, from the preposition inter, meaning “between, among.” Thus the word intercede, in which inter- combines with the Latin verb cedere, “to go,” means “to go between.” Similarly, interject, which comes from Latin iacere, “to throw,” means literally “to throw something between or among others.” And intervene, coming from Latin venire, “to come,” means “to come between people or things.” In English, inter- is still producing new words, such as interfaith, intertwine, and intercellular.
